Regulation of air-supply in drawing glass cylinders.



. FRINK. REGULATION OF AIR SUPPLY IN DRAWING GLASS CYLINDERS.

APPLIOATION IILED NOV. 27,1908.

0 1 9 1 1L 1 .L 0 0 d ,w H. 5% P R. FRINK.

. REGULATION OF AIR SUPPLYINDRAWING GLASS CYLINDERS. A PP-LIUATION FILED NQVL27. 1908 972 14 v Patented 0et 11, i910.-

Mar/w g UNITED STATES PATENT OFFICE,

nonnn'r L. rnmx', 01 C'LEVELAIND, 01110.

-BEG'UI JATION OF AIR-SUPPLY IN DRAWING GLASS CYLINDERS.

Specification 9! Letters Patent. 1

Application as November 27, iaoa, Setial No. 464,654.:

To all whom'i timay concern:

Be itknown ,illtlfLliOBEliT FRINK, a

citizen of the United States, and a resident- 'ofQ-leve'land, coiinty of Cuyahoga and State ,of'Qhiqlm ve invented a new and useful I-m roreineiitfiir'Regula-tion of Air-Supply.

in iawing Glass Cylinders, of which the folloiiflng lsa' specification, the principle of the invention'be ng herein explained and the 1,0

best mode in whic I have contemplated ap, plying. that rinciple, so as to distinguish ibfrohi other in ntions.

"lt-"ncedscarcell be pointed out that the supplying of 'a'ir'to thecylinder in the draw ingot glass bynnechanical means calls forconsiderable delicacy of, adjustment, inas' innc'h-a's 's'ucli iniecl' ahical supply takes the place of that supplied from the" lungs of the blower and controlled by his skill and ex erience, in them 'i'nanu'ally practiced. ll 'ile this dilticiilty'of maintaining a proper rate 'of' supply' is a ap'arent even in the contiimoiisprocess or raiving cylinders where the airis supplied to" aportion of the cylinder lying between a' fixedfh'ead rising from the bath ofxni'olteir metal and thellevel of suclilmetal itself, such difiiculty is considerably increased where the discontinuous 'or mte itten t methodof drawing prevails,

since; a 'graduallyincreasing amount of airistequl-red inoijder to properly distend the cylinder-walls. In the atter connection, 1n-

deed, :there" have "b'een some attempts for "e'flect'ing a var'iat ion in the rate of supply,

sucha'ar-iatiol'i being'correlated by mechanicalnic'a'n. "'wit-h' 'the inoveinent of the bait,

orjcziri Qea hereby 's'uc'h hait is raised and lowered} Bythe' present invention, on the ccntrtttw, I' pro'iose to ett'ect this regulation niakingfit ih'e ate {of supply dependent upon the pressure=obta1nin f10l11 tl1116 'to time-withia'the cylinder itse f,.and it IS fur- ==ther'=prbposedthat-*such invention shall be equal or 'inet'hods ofdrawu ng cylinders referred y applicable to either ofl the processes mama To the" -accoin-plisl'in1ent of these and re- ;lated' ends; saithinventi on, then, consists of.

' existing the steps and a mean he'reina fter full v describedand partichl-arly pointed out in theclaims-I Pre should} expl a Within -th linderis affected 'not by the irate at; which 1 fluid f suphere't a ate 'to such ,dcscription,' I

.unal

1 and satisfactory fashion,

-- the I pressure actually enden't -'upon -variousconditions Thus the composition of. the

molten lass, alTect in as it does the 'vis- 0051i) of the latter; the temperature of such glass, which likewise aifccts its v1sc0s1ty-;

the size of the cylinder, determining thelvol of air that is heated and thereby the Patented Oct. 11, 1910.

amount of expansion; thespeed of the draw,

which determines vthe area of heated, semiplastic glass that exposed to the action of such air; the initialtemperature of the entering air; and the specific heat of-such air, whereh air genetically designated any suitable pressure fluid, and specifically the mixture of various gases constituting the atmosphere;including watery igpor in varying amount; all these cooperate in governing the pressure within the cylinder. However, these different influences can allbe more or less accurately determined," and, once determined for any partlcular batch of lass and period of time, a suitable control 0 the volume of air simultaneously supplied to the, cylinder will succeed' in regulat-in the diameter and other characteristics of the latter to adegree of certainty thus far unattainedin glass drawing operations. .It

has been a lread-"explaincd that it is with the control of such an; volume t-hat the preseut invention is concerned; the determination and control of the' other nifluencesenninerated above are properly Sub ect matters for independent explanation and disclosure. The annexed drawings and the followlng' description set forthin detail certain ineans and one mode vot carrying out the-invention such disclosed iu'eans aiid mode .illustratinq however, but one 0t various way-s 111 which the principle of theiniiention inay'be used.-

In said annexed drawingsi l igure 1 is a partial side elevation and partlal'sect'lon' of a continuous cylinder drawing plant,

wherein havc been invorporated my several improvements for. regulatingthe supply of air to the cylinder hcingdrawn; Fig. 2 is a similar vicwol adiscontnmm'is or 1nter- .1uittent drawing apparatus, showing the mode oil incm'poratnng such improvements therein: \vln-lc Fl-grs. 3, a and 5 are sectional views of various details of such improved apparatus.

leterring' first of all to the continuous" type of drawii-lg: mechanism illustrated i-n'-v art-augrnu-nt and iuodc oi opt-ration thereof fully set forth in in issued; Patent No.-. $l-l',](l2,-hea ring date March 190T. Forfi shown).by means of a passage or'ycon duit A, a suitable gate bein interposed in such the present purpose it willhence 'suttlce' to state that the cylinder; designedtobe drawn from a drawing pot',.0r receptacle B to which the molten glass is supplied-from anadjacent glass melting furnace (not pass'a e, wherebythe ow ofmolten glass e stopped when desired, The draw-' ing mechanism proper comprises a set of rolls D,- shown as being two innumber in the casein hand, and located-directly above the drawin pot B just described. The cylinderor 7 between these rolls D, and drawn upwardly roller being drawn is pressed Q-by them'oncelit has been started. Rising wardly through an opening in the bottom Ii o jthe drawing-pot, or r eceptacle,.to a short distance above the contemplated level of "aroundf Wl11Ch tllQ Cyl111de1 is drawn, and by molten glass therein, is a drawing head B,

means of which, taken in conjunction'with anairi'supply that is furnished throughfsaidhead', the' diameter of such cylinder is regulated." Q

In its; details of construction, drawing head 13 may take on various forms, the one here shown,as also the specific construction of potB forming no part of the present invention, In the present instance, such- "head is conical orjfunnel like in'shape, and

is'supportedlupon two concentric pipes 6 6, which together with f'suich head are const'ructed .of siiitablematerial to resist the temperature to which they are exp'osedwhen. surrounded by the metal in pot B. 'The 7 central aperture 72 in the head is connected as shown with the inner b of the two pipes 2 thehead andthe level of the metal in the pot; Atthe same time, if desired, suction means'may be connected with the'inner pipe 6, although this is a matter of i'ndiflerence in the present connection, it being' to the regulation of the supply of air through such outer pipe that directed. l For supplying. airtothe pipej ln attention will" here be question,

suitable mechanism is provided,-su.ch mechanism comprising a supply pipe c,- a drum v c? laterally connected with such supplyrpipe,

anda. blower C having its delivery pipe 0 extending through said drum, and open ng. laterally into the same. Weigh-ted escape valves 0 c are provided for'the upper end I p ofthe blowerdelivery pipe, and for an openbeenjde ribed, wh ch-inner caslnghas its ,0

111g (in said drum located in its side, substantially opposite the supply pipe, (see Fig.

3): The general details of the air supply.

inechanisnrthus far described, liheu'is'e- .are

not presented as a part of the present invention, being fully set up and claimed in my co-pending application, filed 'July Q-l, 1908,. Serial No. 445,0.77/[By'si1tfl1 mechanism, I am enabled to supply a-substantially constant volume of air to the portion of the adjusting such aperture, 'it' being then 0011-.

templated that'no further regulation in this *particular would be required once the ap- To render this air paratus is in operation. supply mechanism, however, still more delicately responsive to the condition ott'disten tion of the plastic base of the' roller I now substitute for such manually controlled valve, av Valve automatically operated by inanometric means connected with a pipe leading to the cylinder portion "to which the c air is being-supplied.- In the'pre'ferred form illustrated, (see Fig, '5), such means comprise an open vessel D containing a suitable liquid, a plated pivotally,mounted,on.pins. d forminga transverse aXisfabove said 'vessel, and a second vessel (Z ;invertedWithin said first vessel, and inclosingthe end of a duct Z that passes upwardlythroughpipes Z2 b't-formingthe support .of the drawing. head 13, and opens into the loner cylinder portion, as'has'been already indicated. This duct rises safely above the level of the liquid in the outer vesselD of the manometer, and, as will be obvlous, variation .of pressure 111 such cylinder portion will by reason of the connect-ion thus had cause the inverted ves sel of the manometer Z to rise and fall responsively, The one end ofthe 'pivotally mounted plate connected with such rising and falling vessel, is provided with "a, counter-weight, (Z and the other is connected with the valve in supplypipe c-,.by' means of a connecting rodorfli-nl; (F. This valve is' preferably of the liquid-seal type,"

ii1.orde1 that its operation maybe fric- "tlonless as possible, not only because an undue burden Would otherWise be imposed upon the manometer, constituting the operative means for said valve, but also because the. pressures. dealt "with, as will be readilyunderstood,-a re relatively low.

By referring to Fig. 4, such. valve y 'ill be seen t'ocompi'gise an outercasing Di. contain- .fr'om Overthe: end of-such pipe ing '(Z ,con neeted with the manometer as has 'ing liquid, as for instancefglycerin, above WllljCh'fiXt/Bl'ld-S the portion of p pe ct lead ng 'later'al walls perforated as shown, so that the effect ofits risingand falling wiil be. to vary the amount of a r passing therethrough. It will thus be seen that any variation n pressure in the lower portion of the. cylinder or roller" will be promptly and -i'mpro'ved regulating apparatus to the discontinuous,'or intermittent, drawing met-l1 anism as shown in Fig. 2, the detailed constructiolrof the air supply mechanism proper and: the manometr'ic controll ng .means need not. besp 'ecifical1 ',"noted, since :metal in the pot, such air supply pipe is c011 nected with the closed bait' E that here con-J stituteS, in conjunction with suitable operating mechanism, the drawing means proper.

Such air s'upply "pipe, in effect, comprises a series of telescoping pipes, e e e ,-with the upperof which pipe c, of the air supply. mechanism is "connected. In the absen'ce of any drawing head B, furthermore, the duct (1 for the "manometer rises upwardly ,from.

. the bottom of-the"drawing p0t, projecting a suflicieht distance above the 'level of the metaltherein to: assure its remaining unobstructed. The portion of the duct thus within the pot must-poi course, consistfof suitable heat resisting material. Not only is my improved method of regulation thus adaptable, as. shown, to diverse tyxes of glass drawing mechanism, but the simpllclty of the construction and. operation of the apparatus involved, relieve such method of diffic'ulties usually to be apprehended in 0011-, nection with automatic devices.

- .Inz'conclusion it' may be remarked that sincethe pressure of air-within the cylinder,

and, consequently, the distention of. the plas- -.tic portion of suchcrlind are functions ofvarious i1ifiuences,.su one or more of these might be selected as the factor controlling the! rate of supply of air. instead of such pressure, which is rather to be regarded as a resultant 0? them all.

()ther mod s of applying the principle of my invention may be employed instead of the'one explained, change being made as r gards the means and the steps herein disclosed, provided those. stated by any one of the following claims'or their equivalents be employed.

I therefore particuhwly point out and dis; tinctlyc'laim as my invent-ion 1. The method of producing hollow glass articles, which consists in drawing a cylin- .comn'1'unication' with the int the cylinder whereby it willb operatedby der i'rolna'bath of mo l i glass flow of pressure fluid to said" i utilizing pressure .within thee} lip, pende'iitly of the pressur "supply to the inder for regulating saidp 2. In apparatus for drawing U a receptacle forthe;molt'en glass, mecha. lsn'rt'or drawing. the cylinder',i1ineanslfdr efiecting a flow of pressure flu idfto'the interior offthe cylinder, and means har'jig independent it' saidcfyl? inder and actuated by raria n lnfpres'sure therein for controlling thefai Suppl 3. In apparatus for-dra'ivin ffglass,afreceptacle-for the moltenglasechanisi'nlfor so drawing the cylinder, means for. supplying,

fluid pressure tothe .inte'rior snchjeylhp -der,' and manometric"means' ha ying indei;

pendent communication with the interior-poi changes of pressure within the "cylinder for controlling the fluid pressure supply;

.4. In apparatus for. t lrawing"glass,,a drawing pot. or receptacle mechanism cooperative with said receptacle to draw a'cyl- 9o inder from molten glass therein, means for I supplying fluid pressure to theinte'rior of such cylinder, a valve controlling "such supply and amanometer adapted to operate said valves, said manometer-.having inde pendent pipe connectionwith the'interior of said cylinder so as to be operatedby changes ofpressureswithin the latter.

5. In apparatus for-drawing glass, a drawing pot or receptacle, mechanism -cooperative with said receptacle to draw a cyl-' inder from 'molten glass therein, ahead around which such eylinderis drawn, an air supply pipe in connection with said'headopening in'to'the portion of said cylinder between said head. andthe bath, a manom eter and'a second pipe opening into such cylinder portion "and connected with said manometer. v

'6. In apparatus for drawing glass, :1 drawing pot or receptacle, mechanism 00- operative with said receptacleto draw a cylinder from molten glass therein, 'a heat". around which such. cylinder is drawn. two pipes. one within the other, for supporting said head and opening. the one into the portion of said cylinder between said head and flow of pressure fluid into'the article, and 130 gorerning flow by means of the pres sure within said-cylinderthrough a: direct and unrestricted means tov a pressure I8g11- lating, device.

,5 8. In an apparatus for fdrawing'glass, .a

receptacle .containing' the molten glass,

Q1nechanisnfco6perative with {the said recept acle'. for forming-a hollow article; an air supply pipeincon nection with said recep- 10- tac'le and said n1echani.sm whereby the flow 'of pressure fluid may be introduced into thev article, manometric means 'for controlling the flow of the pressure fluid, and direct and unrestricted independent means for connect '15 v.ing the space ithin thc.article"w1tli the ma.-

nometric means. I r,

'9, A 1nethod of producing hollow glass articles, 'Which consistsin drawing a cylinder from a bath of molten glass,.causing the 2O flow of pressure fluid tO tllE interior ofsuch cylinder, and utilizmg he' pressure created Within said cylinder to control the fluid supply; I 10.;A method of producl g hollowglass 25 articles, which. consists in' d arring a cylin- Jder from a bath of molten glass,-

the

flow of pressure fluid tothe interior of such 1 cylinder, and utiliz'ing pressure created in said cylinder toc'on trol manometric means 1 operatively associated with controlling means "for pressure to said cylinder;

ll. An' apparatus for drawmg "glass, a ,4

drawing pot or receptacle, mechanism operatin with such receptacle to draw a cylinder irom molten glass therein; fluid pressur generatingmeans, supply pipes connectin such cylinder with the fluid pressure gene? 1 .ato r, primary pressure, regulating means 111 connectron wlth said'supply pipe, and fluidregulating means connecting said supply pendent connecting'means. i 1

Signed by me thisl? day of November, 1908. v 1 ROBERT arm; Attested by v y E. A, Fun,

II. K BEcK.

4o pipe with said cylinder, operated by the' pressure Within said cylinder through inde- 

